<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #myh1 {
            color: pink;
        }
        .c1 {
            color: darkgray;
        }
        #myh1, h3 {
            background-color: antiquewhite;
        }
        [type] {
            color: blue;
        }
        [type="text"] {
            background-color: lightskyblue;
        }
        * {
            border: darkblue 1px solid;
        }
    </style>
</head>
<body>
<input type="text">
<input type="password">
<h1 id="myh1">张三</h1>
<h1>李四</h1>
<h1 class="c1">王五</h1>
<div>div1</div>
<div>div2</div>
<div class="c1">div3</div>
<h3 class="c1">我是h3</h3>


</body>
</html>